v. 1. Animals.--v.2. Natural wonders.--v. 3. Inventions.--v. 4. Transportation.--v. 5. Caves to skyscrapers.--v. 6. Birds, fish, and insects.--v. 7. Exploration and discovery.--v. 8. Treasures of the earth.--v. 9. Science and technology.--v. 10. Myths and legends.--v. 11. Holidays around the world.--v. 12. A tour through time.--v. 13. The continents.--v. 14. Stories.--v. 15. The human body.--v. 16. The far West.--v. 17. Great capitals.--v. 18. Great leaders.--v. 19. Art through the ages.--v.20. Mexico and the Caribbean.--v.21. South America.--v.22. Index
A twenty-volume illustrated encyclopedia with each individually indexed volume devoted to one general topic such as plants, inventions, holidays, and others